Epoch Timestamp Converter
Paste a Unix timestamp to see the date in UTC and your local time — or pick a date to get its epoch value. Seconds and milliseconds are detected automatically.
Epoch → Date
Enter a timestamp to begin.
- ISO 8601
- UTC
- Local time
Date → Epoch
- Epoch (seconds)
- Epoch (milliseconds)
How does unit detection work?
Timestamps with 10 digits or fewer are treated as seconds (valid up to the year 5138); 11–13 digits are treated as milliseconds. This covers every timestamp you'll encounter in practice.
Is anything sent to a server?
No. Conversion happens entirely in your browser with JavaScript — nothing is uploaded.